I watched an old TV episode of ‘The Invaders’ with my daughter this morning. Early science fiction, it may have been, but it was filmed in territory that I recognize from a thousand Westerns. Another thing in common was the Mexican Spanish contributed by extras. It adds color, I suppose.
Although I had two years’ exposure to French at school, I would have come across at least as much Spanish in movies and TV series. I got used to it. It must have sunk in. Some subtle use of subtitles could have produced quite an educational effect, I dare say.